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94 lines
2.4 KiB
94 lines
2.4 KiB
/* |
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* Copyright 1992, Linus Torvalds. |
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* Copyright 2010 Tilera Corporation. All Rights Reserved. |
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* |
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* This program is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU General Public License |
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* as published by the Free Software Foundation, version 2. |
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* |
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* This program is distributed in the hope that it will be useful, but |
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* WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or |
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* NON INFRINGEMENT. See the GNU General Public License for |
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* more details. |
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*/ |
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#ifndef _ASM_TILE_BITOPS_H |
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#define _ASM_TILE_BITOPS_H |
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#include <linux/types.h> |
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#include <asm/barrier.h> |
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#ifndef _LINUX_BITOPS_H |
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#error only <linux/bitops.h> can be included directly |
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#endif |
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#ifdef __tilegx__ |
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#include <asm/bitops_64.h> |
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#else |
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#include <asm/bitops_32.h> |
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#endif |
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/** |
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* ffz - find first zero bit in word |
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* @word: The word to search |
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* |
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* Undefined if no zero exists, so code should check against ~0UL first. |
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*/ |
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static inline unsigned long ffz(unsigned long word) |
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{ |
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return __builtin_ctzl(~word); |
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} |
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static inline int fls64(__u64 w) |
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{ |
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return (sizeof(__u64) * 8) - __builtin_clzll(w); |
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} |
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/** |
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* fls - find last set bit in word |
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* @x: the word to search |
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* |
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* This is defined in a similar way as the libc and compiler builtin |
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* ffs, but returns the position of the most significant set bit. |
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* |
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* fls(value) returns 0 if value is 0 or the position of the last |
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* set bit if value is nonzero. The last (most significant) bit is |
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* at position 32. |
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*/ |
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static inline int fls(int x) |
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{ |
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return fls64((unsigned int) x); |
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} |
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static inline unsigned int __arch_hweight32(unsigned int w) |
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{ |
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return __builtin_popcount(w); |
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} |
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static inline unsigned int __arch_hweight16(unsigned int w) |
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{ |
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return __builtin_popcount(w & 0xffff); |
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} |
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static inline unsigned int __arch_hweight8(unsigned int w) |
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{ |
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return __builtin_popcount(w & 0xff); |
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} |
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static inline unsigned long __arch_hweight64(__u64 w) |
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{ |
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return __builtin_popcountll(w); |
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} |
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#include <asm-generic/bitops/builtin-__ffs.h> |
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#include <asm-generic/bitops/builtin-__fls.h> |
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#include <asm-generic/bitops/builtin-ffs.h> |
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#include <asm-generic/bitops/const_hweight.h> |
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#include <asm-generic/bitops/lock.h> |
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#include <asm-generic/bitops/find.h> |
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#include <asm-generic/bitops/sched.h> |
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#include <asm-generic/bitops/non-atomic.h> |
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#include <asm-generic/bitops/le.h> |
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#endif /* _ASM_TILE_BITOPS_H */
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